%function out = addNoise( sigma )
sigma = 0.01;
I = imread('E:\Fun\SeniorThesis\images\star2.bmp');
I = rgb2gray(I);
U = imnoise(I, 'gaussian', 0, 0.1);
subplot(1,2,1);
imshow(I,[]);
subplot(1,2,2);
imshow(U,[]);
